lkml.org 
[lkml]   [1998]   [Aug]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
DateMon, 24 Aug 1998 18:47:09 +0100
From"Stephen C. Tweedie" <>
SubjectRe: 2.1.xxx makes Electric Fence 22x slower
Hi,

On Mon, 24 Aug 1998 10:05:56 -0700 (PDT), Linus Torvalds
<torvalds@transmeta.com> said:

> The avl code didn't have any replacement, but was removed because it no
> longer mattered for the common case (which was verify_area() - now
> thankfully gone).

> I would try a one-entry cache, that's probably fine for all common uses.

Electric Fence is a special case. Since it generates large mms with
lots of single-page vmas, a one-entry cache is going to have very little
effect; most operations are going to be random insert/delete operations
to the chain or single page demand-zeros.

A single-entry cache will certainly help for the common case, but it's
not the common case which is the problem.

--Stephen


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.altern.org/andrebalsa/doc/lkml-faq.html

\
 
 \ /
  Last update: 2005-03-22 13:44    [from the cache]
©2003-2010